task1_v1.c

/*

    task1_v1.c

    Version with double pointer (which is unnecessary).

    Task from Germin Chan
    https://web.facebook.com/germin.chan

    https://web.facebook.com/groups/543431102664524/?post_id=1174495746224720&comment_id=1174746769532951&reply_comment_id=1175294896144805&notif_id=1591153540531865&notif_t=group_comment&ref=notif


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include<stdio.h>
#include<stdlib.h>

int values_under_100(int *values, int size, int **under_100_array){

    int i, j=0, sum=0;

    for(i=0;i<size;i++){                //for loop to get values under 100
        if ( *(values+i) < 100 ) {
            *(*under_100_array + j) = *(values + i);
            j++;
            sum++;
        }
    }
    return sum;
}

int main(void){
    int i, size;
    int *values;

    printf("\n How many inputs do you want to enter? ");
    scanf("%d", &size);

    values = malloc(size*sizeof(int));                  //dynamic allocation

    for(i=0;i<size;i++){
        printf("\n Enter value: ");
        scanf("%d", values + i );
    }

    int *under_100_array = malloc(size*sizeof(int));    //dynamic allocation
    int count = values_under_100(values, size, &under_100_array);   //call the function

    printf("\n Values under 100 are: ");
    for(i=0;i<count;i++){                               //for loop to print array
        printf("%d ", *(under_100_array + i) );
    }

    printf("\n\n There are %d values under 100.\n", count);

    return 0;
}